Charles J. Bowden - Battle Creek MI Timothy P. Lamie - Portage MI
Assignee:
Fema Corporation of Michigan - Portage MI
International Classification:
F15B 1307
US Classification:
192 12C
Abstract:
A pressure control valve having an electric first stage pilot with a single pilot outlet port and providing a variable pressurized hydraulic fluid to the pilot outlet port and at a pressure that is proportional to an electric input signal variable between first and second values. A second stage hydraulic valve is provided which has a valve body with a spool reciprocally movable in a bore. A first end of the bore is coupled to the aforesaid pilot outlet port. A spring abutment is provided in the bore at a second end remote from the first end, and a spring is oriented between and abuts the spring abutment and one end of the spool remote from the pilot outlet port for urging the spool to oppose the pressurized hydraulic fluid at the pilot outlet port.
